Airbus did an amazing job with the A320 neo. As a passenger you WILL have a nice flight wether the Neo has CFM or PW (to me the 737 Max is STILL a nice aircraft to fly). CFM pros: convenrtional design and lighter engine than GTF CFM cons: not as quiet as PW and not as fuel efficient as PW PW pros: more novel design and more fuel efficient than CFM PC cons: novel design means more issues and heavier than CFM